Dual-wavelength passive q-switched fiber laser by using (Ti3AI (Co.5, No.5)2) D-shaped fiber as a saturable absorber

Robert, Ronald Raj (2024) Dual-wavelength passive q-switched fiber laser by using (Ti3AI (Co.5, No.5)2) D-shaped fiber as a saturable absorber. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A saturable absorber (SA) called Titanium Aluminum Carbonitride, (Ti3AI (Co.5, No.5)2) D-shape fiber structure based on MAX-Phase material has been successfully developed. This SA is used to reliably generate a dual-wavelength Q- switched laser within the C-band region. Their optical properties are investigated and then incorporated within a cavity of an erbium-doped fiber laser to initiate a Q- switched operation. Comparison of the Q-switched laser parameters demonstrated a significant enhancement when using MAX-DS as the saturable absorber. The D- shaped, (Ti3AI (Co.5, No.5)2) structure is linked to two fiber ferules of a patch cord and incorporated into an erbium-doped fiber laser (EDFL) ring cavity. The Q- switched laser operates at two specific wavelengths, v1=1532.36 nm and v2=1558.36 nm. It remains stable within a pump power range of 38.06-75.5 mW. The MAX-DS Q-switched EDFL laser has achieved an enhanced repetition rate of 51.92 kHz and a significantly reduced pulse width of 3.57 μs. The maximum peak power is calculated as 23.74 mW, while the pulse energy reaches a maximum of 84.74 nJ. The optical-to-optical efficiency is 7.81%, the maximum output power is 4.4 mW, and the signal-to-noise ratio is 60 dB. This demonstration indicates that the, (Ti3AI (Ti3AI (Co.5, No.5)2) D-shape structure has the potential to serve as an alternative SA with excellent prospects in optical-related applications

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